SCT-PLC Stress Crack Tester for PET Bottles

The SCT-PLC Stress Crack Tester is designed to test the internal stress in a bottle’s base and for determining the stress crack resistance of blow-molded PET carbonated soft drink bottles. It functions by measuring the propensity for base cracking upon exposure to an aqueous sodium hydroxide solution in a controlled environment, simulating the long-term behavior of bottles.

Models available:

1 testing position

5 testing positions

6 testing positions

10 testing positions

12 testing positions

Testing procedure:

Install and clamp the sample bottle on each position, then close the door.

The affusion head will seal and fill the bottle automatically up to a target volume of water, then pressurize the bottle to a predefined pressure and stay for a specified amount of time (eg: 5 minutes). While the bottle is filled with water and is pressurized, the system will fill the solution into each posistion (number of positions dependent on model ordered)

When time is up, all the testing positions descend to a predefined point and the bottle base will be completely covered by the aqueous solution

Record the time and pressure at which each bottle failed, up until a predefined time

The test stops after the predefined time

Attributes:

Single or Multi-position design, more convenient and efficient (Please consult AT2E for other position requests)

PLC control ensures the highest accuracy and replicability

High-quality stainless steel frame, for safety and durability

Flexible position selection: each position can be controlled separately within the system. Users can enable the positions according to their test requirements

Automatic affusion system

Auto pressure compensation during testing process

Suitable for testing various bottle sizes

Corrosion-resistant design

Anti-explosion and clear observation window, for safe and easy observation of the sample status during tests